they may have submitted to the cpc center directly which is
P.O. Box 5040, Station B
Ontario, Mississauga, L5A 3A4
the address of cic website is
CPC Mississauga
P.O. Box 5040, Station B
Mississauga, ON
L4Y 4H0
not sure of the difference but i would follow the cc , i did the application...